Microangiopathic Hemolytic Anemia (MAHA) as Paraneoplastic Syndrome in Metastasized Signet Ring Cell Carcinomas: Case Reports and Review of the Literature - Arkenau, H -T; Müssig, O; Buhr, T; Jend, H H; Porschen, R (Zeitschrift für Gastroenterologie, 2005)